US 8,576,638 B2Granted

Non-volatile memory device and non-volatile memory system having the same

AssigneeSamsung Electronics Co., Ltd.

InventorsHyung-Gon Kim, Hyuk-Jun Yoo, Youn-Yeol Lee, Soo-Woong Lee, Kyung-Min Kim

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Abstract

A non-volatile memory device may include a memory cell array, a page buffer, a column decoder, a column selection circuit and a repair circuit. The memory cell array includes normal memory cells and redundancy memory cells. In one example, the page buffer may load normal data and redundancy data from the memory cell array. The column decoder may generate a normal column selection signal and a redundancy column selection signal in response to a column address. The column selection circuit may select the normal data and redundancy data in response to the normal column selection signal and redundancy column selection signal. The repair circuit may then output one of the normal data and redundancy data.

Claims22

Dependent claims

A non-volatile memory device, comprising:

a memory cell array including normal memory cells and redundancy memory cells, the normal memory cells and the redundancy memory cells being arranged in rows and in columns and coupled to normal bit lines and redundancy bit lines, respectively;
a row decoder configured to select a row including a first set of the normal memory cells and a first set of the redundancy memory cells in response to a first row address;
a page buffer configured to load normal data through the corresponding normal bit lines from the selected first set of the normal memory cells, and to load redundancy data through the corresponding redundancy bit lines from the selected first set of redundancy memory cells;
a column decoder configured to generate a normal column selection signal and a redundancy column selection signal in response to a first column address;
a repair control circuit configured to generate a column repair signal in response to the redundancy column selection signal;
a column selection circuit configured to select normal data and redundancy data from the page buffer in response to the normal column selection signal and the redundancy column selection signal, respectively;
and
a repair circuit configured to receive the selected normal data and selected redundancy data at first and second inputs, respectively, and to output one of the selected normal data and the selected redundancy data during at least two consecutive clock cycles of an internal clock signal in response to the column repair signal,
wherein the column decoder, the column selection circuit and the repair circuit are configured to operate simultaneously, each being responsive to a different column address at any one time.

6 more elements

A non-volatile memory device, comprising:

a memory cell array including normal memory cells and redundancy memory cells, the normal memory cells and the redundancy memory cells being arranged in a plurality of memory banks, and being coupled to normal bit lines and redundancy bit lines, respectively;
a page buffer configured to load a first set of normal data through the corresponding normal bit lines from the selected first set of the normal memory cells in response to a first row address, and configured to load a first set of redundancy data through the corresponding redundancy bit lines from the selected first set of redundancy memory cells in response to the first row address;
a column decoder configured to generate a first set of normal column selection signals and a first set of redundancy column selection signals in response to a first set of column addresses;
a repair control circuit configured to generate a first set of column repair signals in response to the first set of redundancy column selection signals;
a column selection circuit configured to select a first set of normal data and a first set of redundancy data from the page buffer in response to the first set of normal column selection signals and the first set of redundancy column selection signals, respectively;
and
a repair circuit configured to receive the selected first set of normal data at a first input and the selected first set of redundancy data at a second input, and configured to output a first set of output data selected between the selected first set of normal data and the selected first set of redundancy data sequentially during at least two consecutive clock cycles of an internal clock signal in response to the first set of column repair signals,
wherein the column decoder, the column selection circuit and the repair circuit are configured to operate simultaneously, each being responsive to a different column address at any one time.

5 more elements

A method of operating a memory, comprising:

receiving a first row address;
in response to the received first row address, reading first data from a first row of memory cells, the first data including data from normal memory cells and redundant memory cells of the first row of memory;
latching the first data in a page buffer;
at a first clock cycle of an internet clock signal,
receiving a first column address and determining whether the first column address corresponds to a defective location of the normal memory cells;
at a second clock cycle of the internet clock signal,
receiving a second column address and determining whether the second column address corresponds to a defective location of the normal memory cells,
transmitting a first part of the first data from the page buffer in response to the first column address, and
transmitting a second part of the first data from the page buffer when it is determined that the first column address corresponds to a defective location of the normal memory cells, the second part of the first data corresponding to data read from the redundant memory cells;
and
at a third clock cycle of the internet clock signal,
receiving a third column address and determining whether the third column address corresponds to a defective location of the normal memory cells,
transmitting a third part of the first data from the page buffer in response to the second column address,
transmitting a fourth part of the first data from the page buffer when it is determined that the second column address corresponds to a defective location of the normal memory cells, the fourth part of the first data corresponds to data read from the redundant memory cells,
selecting the first part of the first data and transmitting the first part of the first data, and
selecting the second part of the first data and transmitting the second part of the first data when it is determined that the first column address corresponds to a defective location of the normal memory cells,
wherein receiving the third column address, transmitting the third part or the fourth part of the data, and selecting the first part of the second part of the first data occur simultaneously during one clock cycle.

14 more elements

A non-volatile memory device, comprising:

a memory cell array including normal memory cells and redundancy memory cells, the normal memory cells and the redundancy memory cells being arranged in rows and in columns and coupled to normal bit lines and redundancy bit lines, respectively;
a row decoder configured to select a row including a first set of the normal memory cells and a first set of the redundancy memory cells in response to a first row address;
a page buffer configured to load normal data through the corresponding normal bit lines from the selected first set of the normal memory cells, and to load redundancy data through the corresponding redundancy bit lines from the selected first set of redundancy memory cells;
a column decoder configured to generate a normal column selection signal and a redundancy column selection signal in response to a first column address;
a repair control circuit configured to generate a column repair signal in response to the redundancy column selection signal;
a column selection circuit configured to select normal data and redundancy data from the page buffer in response to the normal column selection signal and the redundancy column selection signal, respectively;
and
a repair circuit configured to receive the selected normal data and selected redundancy data at first and second inputs, respectively, and to output one of the selected normal data and the selected redundancy data during at least two consecutive clock cycles of an internal clock signal in response to the column repair signal,
wherein the column decoder includes:
a normal column decoder configured to generate the normal column selection signal in response to a received column address;
and
a repair detection circuit configured to generate the redundancy column selection signal when the received column address corresponds to a normal column having a defect,
wherein the repair detection circuit includes a plurality of fuses to store an address of the normal column having a defect by selectively cutting the plurality of fuses.

10 more elements

A non-volatile memory device, comprising:

a memory cell array including normal memory cells and redundancy memory cells, the normal memory cells and the redundancy memory cells being arranged in rows and in columns and coupled to normal bit lines and redundancy bit lines, respectively;
a row decoder configured to select a row including a first set of the normal memory cells and a first set of the redundancy memory cells in response to a first row address;
a page buffer configured to load normal data through the corresponding normal bit lines from the selected first set of the normal memory cells, and to load redundancy data through the corresponding redundancy bit lines from the selected first set of redundancy memory cells;
a column decoder configured to generate a normal column selection signal and a redundancy column selection signal in response to a first column address;
a repair control circuit configured to generate a column repair signal in response to the redundancy column selection signal;
a column selection circuit configured to select normal data and redundancy data from the page buffer in response to the normal column selection signal and the redundancy column selection signal, respectively;
and
a repair circuit configured to receive the selected normal data and selected redundancy data at first and second inputs, respectively, and to output one of the selected normal data and the selected redundancy data during at least two consecutive clock cycles of an internal clock signal in response to the column repair signal,
wherein the page buffer includes:
a normal page buffer configured to load the normal data;
and
a redundancy page buffer configured to load the redundancy data, and
wherein the column selection circuit includes:
a normal column selection circuit configured to select data provided from the normal page buffer in response to the normal column selection signal and provides selected normal data;
a second latch circuit configured to latch the selected normal data;
a redundancy column selection circuit configured to select data provided from the redundancy page buffer in response to the redundancy column selection signal and provides selected redundancy data;
and
a third latch circuit configured to latch the selected redundancy data.

15 more elements

Dependencies are inferred from the claim text.